{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-93857", "assignerOrgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "state": "PUBLISHED", "assignerShortName": "WatchGuard", "dateReserved": "2026-09-18T19:09:36.067Z", "datePublished": "2026-10-27T15:52:27.970Z", "dateUpdated": "2026-10-29T10:45:46.751Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "shortName": "WatchGuard", "dateUpdated": "2026-10-27T15:52:27.970Z" }, "title": "Fireware OS Pre-Authentication Stack Buffer Overflow in SIP Proxy Allows Remote Code Execution", "descriptions": [ { "lang": "en", "value": "A stack-based buffer overflow vulnerability in Fireware OS's SIP proxy allows a remote, unauthenticated attacker to execute arbitrary code by sending a specially crafted request through a policy that uses the SIP proxy." } ], "affected": [ { "vendor": "WatchGuard", "product": "Fireware OS", "versions": [ { "status": "affected", "version": "2025.1", "versionType": "custom", "lessThan": "2026.4" }, { "status": "affected", "version": "12.0", "versionType": "custom", "lessThan": "12.12.4" } ], "defaultStatus": "unaffected", "platforms": [ "Default" ] }, { "vendor": "WatchGuard", "product": "Fireware OS", "versions": [ { "status": "affected", "version": "12.0", "versionType": "custom", "lessThan": "12.5.22" } ], "defaultStatus": "unaffected", "platforms": [ "T15/T35" ] } ], "references": [ { "url": "https://psirt.watchguard.com/CVE-2026-93857", "tags": [ "vendor-advisory" ] } ], "cpeApplicability": [ { "operator": "OR", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "12.0", "versionEndExcluding": "12.5.22" }, { "vulnerable": true, "criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "2025.1", "versionEndExcluding": "2026.4" }, { "vulnerable": true, "criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "12.0", "versionEndExcluding": "12.12.4" } ] } ] } ], "metrics": [ { "cvssV4_0": { "version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "baseScore": 9.2, "baseSeverity": "CRITICAL" } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "CWE-120", "type": "CWE", "cweId": "CWE-120" }, { "lang": "en", "description": "CWE-121", "type": "CWE", "cweId": "CWE-121" }, { "lang": "en", "description": "CWE-787", "type": "CWE", "cweId": "CWE-787" } ] } ], "credits": [ { "lang": "en", "value": "Laurent GAFFIE , secorizon.com", "type": "finder" } ], "configurations": [ { "lang": "en", "value": "The exploit for this vulnerability requires a SIP proxy configured on the Firebox.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "
The exploit for this vulnerability requires a SIP proxy configured on the Firebox.
" } ] } ], "solutions": [ { "lang": "en", "value": "Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22
" } ] } ], "exploits": [ { "lang": "en", "value": "WatchGuard is not aware of any exploitation of this vulnerability in the wild.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "WatchGuard is not aware of any exploitation of this vulnerability in the wild.
" } ] } ] }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-93857", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-29T03:56:44.782585Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-29T10:45:46.751Z" } } ] } }